Photo taken on July 13, 2017 shows Dushanzi-Kuqa highway and glaciers on the Tianshan Mountain in northwest China's Xinjiang Uygur Autonomous Region. The Dushanzi-Kuqa highway, which crosses Tianshan Mountain, is dubbed "the most beautiful highway in Xinjiang". (Xinhua/Jiang Wenyao)

Photo taken on July 15, 2017 shows Bayinbulak grassland seen along the Dushanzi-Kuqa highway in northwest China's Xinjiang Uygur Autonomous Region. The Dushanzi-Kuqa highway, which crosses Tianshan Mountain, is dubbed "the most beautiful highway in Xinjiang". (Xinhua/Jiang Wenyao)

Photo taken on July 13, 2017 shows Dushanzi-Kuqa highway in northwest China's Xinjiang Uygur Autonomous Region. The Dushanzi-Kuqa highway, which crosses Tianshan Mountain, is dubbed "the most beautiful highway in Xinjiang". (Xinhua/Jiang Wenyao)

Photo taken on July 15, 2017 shows Dushanzi-Kuqa highway in northwest China's Xinjiang Uygur Autonomous Region. The Dushanzi-Kuqa highway, which crosses Tianshan Mountain, is dubbed "the most beautiful highway in Xinjiang". (Xinhua/Jiang Wenyao)

File photo shows a worker building the Dushanzi-Kuqa highway in northwest China's Xinjiang Uygur Autonomous Region in the 1970s. The Dushanzi-Kuqa highway, which crosses Tianshan Mountain, is dubbed "the most beautiful highway in Xinjiang". (Xinhua)